[lifespeed]

I would like to get Dolby Vision to play on Windows 10 x64 using Nvidia 3080 Ti, Shark 18.2.1.2 and MPC-BE 1.6.11.25 dev, rather than the fallback to HDR10 for Low-Latency Dolby Vision (Dolby Vision, Version 1.0, dvhe.08.06, BL+RPU, HDR10 compatible / SMPTE ST 2086, HDR10 compatible) screenshot below







or even green and pink tinged playback for Dolby Vision, Version 1.0, dvhe.05.06, BL+RPU, below, which I believe is "real" Dolby Vision with Enhancement Layer (EL).  In this example it doesn't even fall back to HDR10, but scales to BT709 color space completely borking color rendering.




Any ideas on how to get this working?  Here is a link to a setup that adds motion smoothing, and uses MPC-BE but doesn't use Shark007.  I don't want to add motion smoothing to my configuration.  Note the screenshots from his effort using CTRL + J in MPC-BE indicate Dolby Vision.

[Shark007]

The setup you linked to is NOT presenting Dolby Vision but is presenting HDR passthough.
You can tell by the NITS. 1000 nits usually = HDR where as 3999 or sometimes 4000 nits is DoVi presentation

To rule out any codec settings being an issue, I 1st pressed [RESET ALL] in my application and then closed it.

For DoVi presentation, I have the monitor already in HDR mode, and in Windows Display settings, I manually set HDR mode On
   

Next, in the renderer settings I change the Windows HDR mode to 'Do not change' and turn on the statistics
   

For a test file I am using this video https://4kmedia.org/lg-amaze-dolby-vision-uhd-4k-demo
and the results are these statistics
   

Be aware that just because some ripping group says the file you downloaded has DoVi, doesnt mean they know what they are doing.
I have personally tested several files from the wild that claim DoVi but just stay in HDR mode.

[lifespeed]

For a test file I am using this video https://4kmedia.org/lg-amaze-dolby-vision-uhd-4k-demo
and the results are these statistics

Thanks for the detailed response, I am able to reproduce your results using the linked Dolby Vision test file.  It looks amazing!